Combination lock



FIG. 1 is a front perspective view of a combination lock showing Applicant's new design;

FIG. 2 is a front view of the combination lock;

FIG. 3 is a rear view of the combination lock;

FIG. 4 is a side view of the combination lock;

FIG. 5 is another side view of the combination lock;

FIG. 6 is a bottom view of the combination lock; and,

FIG. 7 is a top view of the combination lock.

The broken lines indicate unclaimed portions and form no part of the claimed design. 

CLAIM I claim an ornamental design for the combination lock, as shown and described. 